1 files changed, 25 insertions, 0 deletions
diff --git a/spec/ruby/core/matchdata/named_captures_spec.rb b/spec/ruby/core/matchdata/named_captures_spec.rb
new file mode 100644
index 0000000000..10b1f884d6
--- /dev/null
+++ b/spec/ruby/core/matchdata/named_captures_spec.rb
@@ -0,0 +1,25 @@
+require_relative '../../spec_helper'
+
+describe 'MatchData#named_captures' do
+  it 'returns a Hash that has captured name and the matched string pairs' do
+    /(?<a>.)(?<b>.)?/.match('0').named_captures.should == { 'a' => '0', 'b' => nil }
+  end
+
+  it 'prefers later captures' do
+    /\A(?<a>.)(?<b>.)(?<b>.)(?<a>.)\z/.match('0123').named_captures.should == { 'a' => '3', 'b' => '2' }
+  end
+
+  it 'returns the latest matched capture, even if a later one that does not match exists' do
+    /\A(?<a>.)(?<b>.)(?<b>.)(?<a>.)?\z/.match('012').named_captures.should == { 'a' => '0', 'b' => '2' }
+  end
+
+  it 'returns a Hash with Symbol keys when symbolize_names is provided a true value' do
+    /(?<a>.)(?<b>.)?/.match('0').named_captures(symbolize_names: true).should == { a: '0', b: nil }
+    /(?<a>.)(?<b>.)?/.match('0').named_captures(symbolize_names: "truly").should == { a: '0', b: nil }
+  end
+
+  it 'returns a Hash with String keys when symbolize_names is provided a false value' do
+    /(?<a>.)(?<b>.)?/.match('02').named_captures(symbolize_names: false).should == { 'a' => '0', 'b' => '2' }
+    /(?<a>.)(?<b>.)?/.match('02').named_captures(symbolize_names: nil).should == { 'a' => '0', 'b' => '2' }
+  end
+end